Preparation and Characterization of Polymer Electrolytes

Abstract

Two groups of polymer electrolyte samples were prepared by solution cast technique with different Oxygen: Sodium ratio (O/Na = 0, 4, 8, 20, 40, 60, 80, and 100). Polyethylene Oxide, (CH2 -CH2-O) and Polyurethane, (RNHCOOR′) were taken as polymer host matrix and sodium perchlorate (NaClO4) as salt. X-ray diffraction analysis (XRD) shows the complexation of polymer with salt and existence of both crystalline and amorphous phases. The crystallite size and inter-planar spacing of the polymer electrolytes were calculated for XRD data. The Vibrational characterization was carried out by FTIR spectroscopy. The microstructure/surface morphology of the polymer electrolytes was analyzed by Scanning Electron Microscope. The SEM images confirmed the existence of the crystalline spherulite phases separated by amorphous boundary. Frequency dependence of dielectric property and ac electrical conductivity of polymer electrolytes were studied within the frequency range of 100 mHz to 1MHz using complex impedance analysis technique.